北京航空航天大学学报

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不确定着陆环境下的着陆器缓冲机构优化设计

吴宏宇1,王春洁1,丁建中2,丁宗茂1   

  1. 1. 北京航空航天大学
    2. 北京航空航天大学机械工程及自动化学院
  • 收稿日期:2016-12-22 修回日期:2017-03-14 发布日期:2017-04-07
  • 通讯作者: 吴宏宇

Optimization Design of Landing Gear under the Uncertain Landing Environment

  • Received:2016-12-22 Revised:2017-03-14 Published:2017-04-07

摘要: 建立了新型腿式着陆器的动力学仿真模型,并基于仿真模型,使用蒙特卡罗法分析了着陆器在着陆环境不确定下的软着陆性能。为了提升着陆器的软着陆性能,分析了着陆器缓冲机构构型参数对软着陆性能的影响,并利用仿真模型与优化拉丁超立方实验设计获取样本点,构造了反映着陆器缓冲机构构型参数、着陆环境参数与软着陆性能指标值之间复杂关系的响应面模型,之后结合响应面模型与蒙特卡罗法对着陆器缓冲机构的构型进行了优化设计。优化后的缓冲机构使着陆器在着陆环境不确定下的抗翻倒能力得到提升,同时尾喷管底面中心距着陆面最小距离、辅助支柱缓冲行程超出许用值的概率均为0。

关键词: 腿式着陆器, 着陆环境, 不确定性分析, 蒙特卡罗法, 响应面模型, 优化设计

Abstract: A dynamic simulation model of novel leg type lander is established. Based on the simulation model, the soft landing performance of the lander under the uncertain landing environment is analyzed by using Monte Carlo method. In order to improve the soft landing performance of the lander, the influence of configuration parameters of landing gear on soft landing performance is analyzed, and the response surface models which reflects the complex relationship between the configuration parameters of landing gear, the landing environment parameters and the values reflecting the soft landing performance are established. Then the configuration of landing gear is optimized based on the response surface models and Monte Carlo method. Optimized configuration of landing gear enhances the ability of the lander to resist being overturned with the consideration of the uncertain landing environment. Also the possibilities the minimum distance between the center of bottom surface of the nozzle and the surface of the planet and the buffer stroke of assistant pillar exceeding the allowable values are equal to 0.

Key words: Leg type lander, landing environment, uncertainty analysis, Monte Carlo method, response surface model, optimization design


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